Yes, use red Tuck Tape to tape the overlap.

http://www.can-save.ca/index.php?opt...95&Item id=93

Make sure you cover it ALL, including where the pipes are..do what you
can with the sheet plastic, then use the tape
Thanks. I will try this. Is Tuck Tape a better duct tape?

Its what the 'pros' use so I go with it too
BTW, Duct (duck) tape isn't really for taping ducts..use aluminum foil tape
for that application.